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Table 1 The prevalence of sleep disturbances identified by the PDSS with different disease severity

From: Tremor and clinical fluctuation are related to sleep disorders in Chinese patients with Parkinson’s disease

H&Y stage

H&Y = 1

H&Y = 2

H&Y = 3

H&Y = 4

total

PDSS score

<90

3

8

11

4

26

PDSS group %

11.5%

30.8%

42.3%

15.4%

100.0%

H&Y stage %

10.7%

11.8%

35.5%

44.4%

19.1%

90 ~ 105

2

13

7

2

24

PDSS group %

8.3%

54.2%

29.2%

8.3%

100.0%

H&Y stage %

7.1%

19.1%

22.6%

22.2%

17.6%

>105

23

47

13

3

86

PDSS group %

26.7%

54.7%

15.1%

3.5%

100.0%

H&Y stage %

82.1%

69.1%

41.9%

33.3%

63.2%

total

28

68

31

9

136

PDSS group %

20.6%

50.0%

22.8%

6.6%

100.0%

H&Y stage %

100.0%

100.0%

100.0%

100.0%

100.0%